Eraser-cleaner.



Na 715,705. batsmen nec. 9. |902, Y

F. W.`&W. A. E. STUTT. Y

ERASER CLEANER.

.Appuegcinn med Aug. 7, '1902.5

I (un naden.)

Patented neu. 9, |902.

F. W. & W. A. E. STUTT.

EBASEB CLEANER.

-Applcnti on tiled Aug. 7, 1902.

2 Shea tes-Sheet 2.

(No Modeln b-g V 122.775: n v A nu: mams 'Pneus co.. moauwov. wAsHmGvou.nA c,

UNITED STATES PATENT OFFICE.

FREDERICK W. STUTT AND WILLIAM A. E. STUTT, OF DENVER, COLORADO.

ERASER-CLEANER.

SPECIFICATION forming part of Letters Patent N0. 715,705, dated.December 9, 1902.

Application tiled August '7, 1902. Serial No. 118,821. (No model.)

venable others skilled in the art to which it appertainsto make and usethe same, reference being had to the accompanying drawings, and to thefigures of reference marked thereon, which form a part of thisspecification.

Our invention relates to improvements in eraser-cleaners, and isespecially adapted for use in "schools for removing the powdered chalkfrom the erasing fabric after the latter has become laden therewith byrepeated use.

Our object is to provide an apparatus of this class which shall besimple in construction, economical in cost, reliable, durable, andeficient in use; and to these ends the invention consists of thefeatures, arrangements, and combinations hereinafter described andclaimed, all of which will be fully understood by reference to theaccompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a side elevation of our improvederaser-cleaning apparatus. Fig. 2 is a section taken through the casinginclosing the operating mechanism on line 2 2, Fig. 4. Fig. 3 is adetail view of the rock-shaft carrying the eraser-beaters, the latterbeing partly broken away. In this view a fragment of an eraser 8 isshown, the same being located behind a beater. Fig. 4 is a top or planview of the apparatus with the top lid or cover of the casing removed.Fig. 5 is a detail view of the operating cam-shaft. Fig. 6 is a detailface view showing one of the erasers for cleaning which our improvedapparatus is employed. Fig.l 7 is a detail view of one of the beatersshown on a larger scale. Fig. Sis a fragmentary view of the casing,showing the open bearing and the rockshaft therein in section.

The same reference characters indicate the same parts in all the views.

Let the numeral designate acasing which,

as shown in the drawings, is composed of two members 52L and 5c. Thecasing parts or members are connected in any suitable'manner, wherebythey may be readily detached if desired. As shown in the drawings, two'arms or cleats 6 are employed. These arms occupy ya vertical positionand are fastened by screws When it is desired to the respective parts.to remove the top member of the casing, the fastening-screws whichconnect the cleats 6 therewith are removed and the member is lifted off.In the upper part 5a ofthe casing is formed a sort of rack composed ofstrips 7, Vsuitably separated to receive erasers 8. The strips areprovided with ribs or tongues adapted to engage the grooves formed inthe edges of the erasers. The lid or cover 9 of the casing is hinged at10 and held closed by a hook 12, pivoted on the part 5a and engaging aneye 13, attached to the lid. When this lid is'raised, the erasers may beplaced in the rack and removed at pleasure, since the spaces for theirreception are open at the' top. Below the strips 7 a piece 14 islocated, which forms a stop to prevent the erasers from passing too fardownwardly. When placed in the holding-rack, the erasing-faces of theblocks are exposed in the upper part of the casing. As shown in thedrawings, (see Fig. 7,) these faces are provided with longitudinalgrooves 8a, separating the strips 8c of the erasing material.

J ournaled within the upper part of the casing member 5c is a rock-shaft14, whosejour` nals 14a engage bearings 15, which, as shown in thedrawings, are open at the top to permit the removal of the shaft. Thesebearings are closed by the casing part 5a when the latter is inposition. rock-shaft,as shown in the drawings, is square incross-section. To one of the iiat sides of this shaft are secured a number of beaters 16. The lower extremity of each beater is attached tothe shaft byl means of screws 17 or other suitable fastening devices,whereby the beaters may be detached at pleasure. These beaters arepreferably formed of sprin g metal, and they are provided with slots16a, which register with the grooves 8a of the erasers when the beatersare in contact with the latter. These slots permit the escape of thedust or ne chalk as it is removed from the erasingface. This dust passesthrough the slots of The body portion of thisthe beaters and fallsdownwardly into a drawer 1S in the bottom of the casing. This drawer maybe removed and emptied at suitable intervals. To another side of therockshaft is attached a narrow plate 19, which may be called theengaging plate. This plate projects from the rock-shaft to engagementwith a series of leaf-springs 20, whose eX- tremities remote from therock-shaft are bent downwardly and slipped behind a keeperplate 21,applied to the upper part of the casing member 5c. Hence the springs areremovable at will.

Below the rock-shaft 11 is located an operating cam-shaft 22, which isjournaled in the casing member 5c and provided with a threearm cam 23 ateach end of the shaft and located outside the casing member. As theshaft 22 is rotated these cams engage adjustable tappets 24, mountedoutside of the casing on the rock-shaft extremities. The camshaft isprovided with a crank 25 for operating purposes.

On the upper part of each end of the casing member 5c is slidablymounted a keeper 26, provided with a slot 26, through which screws 27are passed into the casing member. Each keeper is provided with aprojection 26C, which closes the bearing 15 at the top and retains thebeater rock-shaft in place when the upper casing member is removed. Theshaftretaining position of this keeper is shown by full lines in Fig. 1and the opposite position by dotted lines in the same figure.

When the apparatus is in use, the casing is tightly closed, so that nodust can escape therefrom. From the foregoing description the operationof the apparatus will be readily understood. Assuming that the erasers 8are in place within the rack of the upper casing member, the cam-shaftis rotated by turning the crank 25. As the arms 23a of the cams 23engage the tappets 24 in succession the beaters lb' are irst thrown awayfrom the erasers to the position shown in Fig. l, whereby the springs 20are placed under tension, and then as the cam-arms release the tappetsthe recoil of the springs forces the beaters 16 forcibly against thefaces of the erasers, whereby the dust is caused to pass through theslots 16u of the beaters and allowed to fall downwardly to thecatch-drawer 1S, as heretofore explained. This operation is repeateduntil the erasers are thoroughly cleansed ol' their powdered contents.

Having thus described our invention, what we claim isl. In aneraser-cleaner, the combination with a casing, of means for holding theerasers therein to expose their erasing-surfaces, a rock-shaft journaledin the casing, provided with beaters and having an engaging plate, aspring in operative engagement with said plate and normally having atendency to throw the beaters against the erasers when the beaters aredrawn away from the erasers, and means for actuating the rock-shaftwhereby it is given a partial turn and released at intervals,substantially as described.

2. The combination with acasing, of means located therein for holdingerasers, a rock shaft journaled in the casing, beater-arms mounted onthe rock-shaft, an engaging plate also attached to the rock-shaft, aseries of leaf-springs mounted on the casing and in contact with theengaging plate of the rockshaft, and means for operating the rock-shaft,substantially as described.

3. The combination with a casing, of means located therein for holdingerasers, a rockshaft journaled in the casing, beater-arms mounted on therock-shaft, an engaging plate also attached to the rock-shaft, a seriesof leafsprings in contact with the engaging plate of the rock-shaft,exposed tappets attached to the rock-shaft extremities, and a rotatingshaft journaled in the casing and provided with cams engaging thetappets of the rockshaft for the purpose set forth.

4a The combination of a casing provided with an eraser-holding rack, aspring-held rock-shaft mounted in open bearings fastened in the casing,exposed keepers slidable on the casing to close the rock-shaft bearings,a tappet on the rock-shaft, beaters mounted on the rock-shaft, and meansfor operating the latter whereby they are alternately drawn away fromthe erasers and driven forcibly against the same, substantially asdescribed.

5. In an eraser-cleaner, the combination with a casing provided with aneraser-holding rack, a rock-shaft journaled in the casing, a series ofindependent beaters mounted on the rock-shaft, an engaging plate alsomounted on the rock-shaft,a series of leaf-springs mounted on the casingin operative engagement with the said plate, a tappet on the rock*shaft, an operating-shaft also journaled in the casing and provided witha cam engaging the rock-shaft tappet, substantially as described.

6. The combination with a closed casing, of a catch-drawer located inits lower portion, an eraser-holding rack located in its upper portion,a rock-shaft journaled in the casing, beater-arms mounted on therock-shaft, an engaging plate also attached to the rock-shaft, a seriesof leaf-springs in contact with the engaging plate of said shaft, andmeans for 0pcrating the latter, substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

FREDERICK YV. STUTT. WILLIAM A. E. STUTT.

lVitnesses:

DENA NELSON, EBERT OBRiEN.

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